Not sure if our neighbors to the south know, but Canada is celebrating our 150 anniversary as a country. Parks Canada has decided it will waive all park fees for the upcoming season. I believe this covers all National monuments and federally run national parks. Anyone coming can enjoy the parks for free. It also covers the lock fees for the Trent Canal system for anyone with boats. Cheers.

Just keep in mind it's your daily park fees that are waived, camping fees are still in place...in fact bookings are way up already on account of this, so for many of those parks if you have not already booked you may be out of luck, for July and August anyhow.